our small book thoroughly and then
take a larger one, you will be surprised to find how much of the latter
you already know. You can then direct your attention to the new
material and to relating it with the old.

(_k_) MAKE A LIST OF REFERENCES AS YOU PROCEED.--Summarize what you
learn and construct an index. Learn where to go to find what you do
not know. You cannot learn everything even about one subject, and the
next best thing to knowing it is to know where to find it or how to
work it out yourself.

(_l_) REVIEW YOUR WORK FREQUENTLY.--Review is not re-studying, but is
going quickly over the main points, looking at them all in their proper
perspective. This will be assisted if you make summaries; writing out
a statement of a thing helps you to understand it clearly and to fix it
in the memory. As Landon says: "The practice of reviewing keeps the
mind in touch with the main lines of the subject; secures freshness and
exactness of knowledge; shows what has been imperfectly learned, and
gives an opportunity for remedying the trouble; strengthens {60} the
recollection and accustoms the mind to recover and give up its stores;
saves waste of energy and the formation of bad mental habits; and thus
leads to complete assimilation of the subject."

(_m_) SET SPECIAL TIMES FOR YOUR RECREATIVE STUDY.--Cultivate some
hobby as a relief from your concentrated study of books. Music, some
games of cards, chess, billiards, or other relaxations, are admirable
means of recuperation. When you indulge in recreation or recreative
reading, do not let the mind worry about problems of your previous
studies. Make your recreative reading in itself have some aim. Do not
allow yourself to develop in a one-sided manner, but have interests
outside of your main study.

(_n_) IN CONNECTION WITH YOUR STUDIES DO NOT NEGLECT PROPER PHYSICAL
EXERCISE.--Remember that the preservation of your health should be your
principal aim rather than to cram your head with book learning. Study
should not be allowed to interfere with a sufficient amount of physical
exercise in the open air, but this should not be carried to the extent
of severe bodily fatigue. A healthy body is necessary for the fullest
cultivation of the mental powers, but {61} on the other hand, the mind
will not work when the body is exhausted. Moreover, see that your
studies are done under proper conditions of air, light, sun; that you
have a comfortable chair, but not on